linux-kernel - [RESEND PATCH 3.8-stable] ARM: EXYNOS: Fix crash on soft reset on EXYNOS5440

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Date:	Mon, 08 Apr 2013 08:02:55 +0900
From:	Jonghwan Choi <jhbird.choi@...sung.com>
To:	'Jonghwan Choi' <jhbird.choi@...sung.com>,
	linux-kernel@...r.kernel.org
Cc:	stable@...r.kernel.org, 'Kukjin' <kgene.kim@...sung.com>,
	'Thomas Abraham' <thomas.ab@...sung.com>
Subject: [RESEND PATCH 3.8-stable] ARM: EXYNOS: Fix crash on soft reset on
 EXYNOS5440

This patch looks like it should be in the 3.8-stable tree, should we apply
it?

------------------

From: "Thomas Abraham <thomas.ab@...sung.com>"

commit 60db7e5f9c9a25a7a9b01007e6e3f5a93bc16a3a upstream

The soft-reset control register is located in the XMU controller space.
Map this controller space before writing to the soft-reset controller
register.

Signed-off-by: Thomas Abraham <thomas.ab@...sung.com>
Signed-off-by: Girish K S <ks.giri@...sung.com>
Signed-off-by: Kukjin <kgene.kim@...sung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
---
 arch/arm/mach-exynos/common.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 1a89824..3b6de7a 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -299,6 +299,7 @@ void exynos4_restart(char mode, const char *cmd)
 
 void exynos5_restart(char mode, const char *cmd)
 {
+	struct device_node *np;
 	u32 val;
 	void __iomem *addr;
 
@@ -306,8 +307,9 @@ void exynos5_restart(char mode, const char *cmd)
 		val = 0x1;
 		addr = EXYNOS_SWRESET;
 	} else if (of_machine_is_compatible("samsung,exynos5440")) {
-		val = (0x10 << 20) | (0x1 << 16);
-		addr = EXYNOS5440_SWRESET;
+		np = of_find_compatible_node(NULL, NULL,
"samsung,exynos5440-clock");
+		addr = of_iomap(np, 0) + 0xcc;
+		val = (0xfff << 20) | (0x1 << 16);
 	} else {
 		pr_err("%s: cannot support non-DT\n", __func__);
 		return;
-- 
1.7.9.5

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